The DOMPointReadOnly interface's x property holds the horizontal coordinate, x, for a read-only point in space. This property cannot be changed by JavaScript code in this read-only version of the DOMPoint object.
In general, positive values x mean to the right, and negative values of x means to the left, assuming no transforms have resulted in a reversal.
A double-precision floating-point value indicating the x coordinate's value for the point. This value is unrestricted, meaning that it is allowed to be infinite or invalid (that is, its value may be NaN or ±Infinity).
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61 | 79 | 31 | No | 48 | 10.1 | 61 | 61 | 31 | 45 | 10.3 | 8.0 |
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https://developer.mozilla.org/en-US/docs/Web/API/DOMPointReadOnly/x